Can no longer play bo6 and warzone together?

Logged into COD after a while of not playing, played a few games of warzone then tried to load bo6 and got met with an error code searched online and found i had to delete any add on linked to bo7 so deleted them all and now realise that I cannot download warzone again due to it being linked to bo7, is there a workaround for this? Does activision know?